0.8.2.39:

0.8.2.39:
        * New macro SB!INT:BINDING*, uniting LET*, M-V-BIND and AWHEN;
        * add simple inference of iteration variable type;
        * SAME-LEAF-REF-P: look through CAST chains;
        * wrap all uses of handle_rt_signal into #!+sb-thread;
        * (SB-ACLREPL): CD-CMD takes one argument, not two.